Questions from Essentials of Statistics

Q: Consider the following data set. / a. Draw

Consider the following data set. a. Draw a graph. b. Compare the percentage of the observations that actually lie within two standard deviations to either side of the mean with that given by Chebyshev...

Q: In the article, “Length of The Beatles’ Songs” (

In the article, “Length of The Beatles’ Songs” (Chance, Vol. 25, No. 1, pp. 30–33), T. Koyama discusses aspects and interpretations of the lengths of songs by The Beatles. Data on the length, in secon...

Q: As reported by the U.S. Census Bureau in Educational

As reported by the U.S. Census Bureau in Educational Attainment in the United States, the percentage of adults in each state and the District of Columbia who have completed high school is provided on...

Q: As reported by the U.S. Census Bureau in Educational

As reported by the U.S. Census Bureau in Educational Attainment in the United States, the percentage of adults in each state and the District of Columbia who have completed a bachelor’s degree is prov...

Q: Consider the data set 1, 2, 3, 4,

Consider the data set 1, 2, 3, 4, 5, 6, 7, 8, 9. a. Obtain the mean and median of the data. b. Replace the 9 in the data set by 99 and again compute the mean and median. Decide which measure of center...

Q: Refer to Exercise 1.44. a. List the

Refer to Exercise 1.44. a. List the 20 possible samples (without replacement) of three artists that can be selected from the six. b. Describe a procedure for taking a simple random sample of three art...

Q: A study by researchers at the University of Maryland addressed the question

A study by researchers at the University of Maryland addressed the question of whether the mean body temperature of humans is 98.6◦F. The results of the study by P. Mackowiak et al. appeared in the ar...

Q: L. Petersen et al. evaluated the effects of integrated treatment

L. Petersen et al. evaluated the effects of integrated treatment for patients with a first episode of psychotic illness in the paper “A Randomised Multicentre Trial of Integrated Versus Standard Treat...

Q: Anthropologists are still trying to unravel the mystery of the origins of

Anthropologists are still trying to unravel the mystery of the origins of the Etruscan empire, a highly advanced Italic civilization formed around the eighth century B.C. in central Italy. Were they n...

Q: As you discovered earlier, ordinal data are data about order or

As you discovered earlier, ordinal data are data about order or rank given on a scale such as 1, 2, 3, or A, B, C,.... Most statisticians recommend using the median to indicate the center of an ordina...